My 235cc inlet port RHS chevy ally heads were about $720 for the pair, with valve guides and seats cut. In iron same heads about $550. (about 310 cu ft/min)
A set of replica vortec heads in ally with the valve spring seats opened to 1.5" and guides and caps designed to give you .6" of lift with valves springs and pushrod guides all installed about $590 the pair. (about 220 cuft/min)
brodix 18 degree castings, new about $1400-1800 a pair
SB2 castings fully loaded with titanium vales the works A1 condition but second hand about $1800 to $2200 (these are 400 to 430 cuft/min heads and are very nice!

Chevy heads are good value
Mike